<!doctype html>
<div style="-moz-transform: rotatex(45deg); -moz-transform-style: preserve-3d; width: 110px;">
  <div style="-moz-transform: rotatex(45deg); -moz-transform-style: preserve-3d; width: 110px;">
    <div style="-moz-transform: rotatex(45deg); -moz-transform-style: preserve-3d; width: 110px;">
      <div style="-moz-transform: rotatex(45deg); width: 100px; height: 100px;
      background: lime; border-style: solid; border-width: 2px 2px 0 0">
      </div>
    </div>
  </div>
</div>
